CN-116560418-B - Automatic control method, device, equipment and medium for sulfur content in mixed gas

CN116560418BCN 116560418 BCN116560418 BCN 116560418BCN-116560418-B

Abstract

The invention discloses an automatic control method, device, equipment and medium for sulfur content in mixed gas. The method comprises the steps of mixing and configuring multiple configuration gases according to preset proportioning to obtain mixed gas, collecting at least one configuration gas real-time parameter of each configuration gas, estimating sulfur content in the mixed gas according to the configuration gas real-time parameter, calculating sulfur dioxide contribution degree of each configuration gas to the mixed gas according to the at least one configuration gas real-time parameter of each configuration gas if the sulfur content is determined not to meet low sulfur emission conditions, and redetermining proportioning of each configuration gas when the mixed gas is generated according to the sulfur dioxide contribution degree to obtain the mixed gas meeting the low sulfur emission conditions. According to the technical scheme, the automatic regulation and control of the sulfur content in the mixed gas can be realized, so that the control of the sulfur dioxide content in the flue gas generated by the combustion of the mixed gas is realized, and the accuracy of the sulfur content control in the mixed gas is improved.

Inventors

WEI ZHONGLIANG
Lao Haiquan
YAO HONGBO
DAI JINHUA
LIU ZHENHUI
WEI HONGKUN
JIANG GUIPING
PANG RUIMING
LV JUN
CHEN FULIN

Assignees

广东中南钢铁股份有限公司

Dates

Publication Date: 20260508
Application Date: 20230524

Claims (9)

1. An automatic control method for sulfur content in mixed gas is characterized by comprising the following steps: mixing and preparing a plurality of configuration gases according to a preset proportioning amount to obtain mixed gas, wherein the proportioning amount is the hour flow rate of each configuration gas which is matched with a mixed gas furnace kiln; Collecting at least one configuration gas real-time parameter of each configuration gas, and estimating the sulfur content in the mixed gas according to the configuration gas real-time parameter, wherein the sulfur content in the mixed gas is the sulfur dioxide content in the flue gas generated after the mixed gas is combusted; If the sulfur content is determined to not meet the low sulfur emission condition, calculating the sulfur dioxide contribution degree of each configuration gas to the mixed gas according to at least one configuration gas real-time parameter of each configuration gas; the proportioning quantity of each configuration gas when the mixed gas is generated is redetermined according to the contribution degree of each sulfur dioxide so as to obtain the mixed gas meeting the low sulfur discharge condition; The method comprises the steps of obtaining target configuration gas with highest sulfur dioxide contribution degree and second associated configuration gas with lowest sulfur dioxide contribution degree from all configuration gases according to the sulfur dioxide contribution degree, and calculating to obtain the threshold flow of the target configuration gas by a preset formula, wherein the threshold flow of the target configuration gas is the maximum value of V1 calculated by the preset formula, and the preset formula is as follows: wherein, the method comprises the steps of, The method comprises the steps of obtaining a preset threshold value of sulfur content of mixed gas, wherein Si is an actual measurement value of total sulfur content of an ith configuration gas, vi is an hour flow of the ith configuration gas, ni is an exhaust gas amount generated by combustion of the ith configuration gas per cubic gas, adjusting the proportioning amount of a target configuration gas according to the threshold flow to obtain a new proportioning amount, judging whether the mixed gas meets preset mixing standards on the basis of the new proportioning amount, generating the mixed gas meeting low sulfur emission conditions according to the new proportioning amount when the mixed gas meets the preset mixing standards, respectively obtaining heat values of a first associated configuration gas and a second associated configuration gas when the mixed gas does not meet the preset mixing standards, and adjusting the current proportioning amount of the first associated configuration gas and the second associated configuration gas according to the preset rules until the preset mixing standards of the mixed gas are met.
2. The method of claim 1, wherein collecting at least one configuration gas real-time parameter of each configuration gas and estimating the sulfur content in the mixed gas according to the configuration gas real-time parameter comprises: collecting the component proportion of different gas components in each configuration gas, the actual measurement value of the total sulfur content and the hour flow in real time; according to the component proportion, calculating to obtain the smoke quantity generated by the combustion of each configuration gas unit cubic gas; And estimating the sulfur content in the mixed gas according to the measured value of the total sulfur content of each configuration gas, the hour flow and the smoke quantity generated by the combustion of the unit cubic gas.
3. The method according to claim 2, wherein calculating an amount of smoke generated by combustion of each of the configuration gas unit cubic gas based on each of the component ratios comprises: And calculating the amount of smoke generated by the combustion of each configured gas unit cubic gas based on a preset formula according to the component proportion, wherein the preset formula is as follows: ; Wherein n i is the amount of smoke generated by combusting cubic gas in the ith configuration gas, w H2 is the volume ratio of H2 in the ith configuration gas, w CO is the volume ratio of CO in the ith configuration gas, w CH4 is the volume ratio of CH4 in the ith configuration gas, w CnHm is the volume ratio of CnHm in the ith configuration gas, and w k is the volume ratio of gas in the kth configuration gas in the ith configuration gas.
4. The method of claim 2, wherein estimating the sulfur content of the mixed gas based on the measured total sulfur content of each of the configuration gases, the hourly flow rate, and the amount of smoke generated by combustion of the unit cubic gas comprises: Based on the measured value of the total sulfur content of each configuration gas, the hour flow and the smoke quantity generated by the unit cubic gas combustion, calculating the sulfur content of the mixed gas according to a preset formula, wherein the preset formula is as follows: ; Wherein (SO 2 ）（ Initial initiation ） is the sulfur dioxide content in the flue gas generated after the mixed gas is combusted, si is the actual measurement value of the total sulfur content of the ith configuration gas, vi is the hour flow of the ith configuration gas, and n i is the flue gas amount generated by the combustion of the unit cubic gas of the ith configuration gas.
5. The method of any one of claims 1-4, wherein calculating the sulfur dioxide contribution of each of the configuration gases to the mixed gas based on at least one configuration gas real-time parameter of each of the configuration gases comprises: Calculating the sulfur dioxide contribution degree of each configuration gas to the mixed gas based on a preset formula according to at least one configuration gas real-time parameter of each configuration gas, wherein the preset formula is as follows: ; Wherein Mi is the contribution degree of the ith configuration gas to the sulfur dioxide content in the flue gas generated after the mixed gas is combusted, si is the total sulfur content actual measurement value of the ith configuration gas, and n i is the flue gas quantity generated by the combustion of the unit cubic gas of the ith configuration gas.
6. The method of claim 1, wherein adjusting the current ratio of the first and second associated configuration gases according to a preset rule until the preset mixing criteria of the gas to be mixed are met, further comprises: judging whether the sulfur content in the mixed gas exceeds a threshold value or not on the basis of the current proportioning; if the ratio does not exceed the threshold value, generating mixed gas meeting the low-sulfur discharge condition according to the new ratio; and if the current proportion of the first association configuration gas and the second association configuration gas exceeds the threshold value, returning to execute the operation of adjusting the current proportion of the first association configuration gas and the second association configuration gas based on the preset rule until the ending condition is met.
7. An automatic control device for sulfur content in mixed gas, which is characterized by comprising: The mixed gas generation module is used for mixing and preparing a plurality of configuration gases according to a preset proportioning amount to obtain mixed gas, wherein the proportioning amount is the hour flow rate of each configuration gas which is mixed into the mixed gas furnace kiln; the mixed gas sulfur content calculation module is used for collecting at least one configuration gas real-time parameter of each configuration gas and estimating the sulfur content in the mixed gas according to the configuration gas real-time parameter; The sulfur dioxide contribution degree calculation module is used for calculating the sulfur dioxide contribution degree of each configuration gas to the mixed gas according to at least one configuration gas real-time parameter of each configuration gas if the sulfur content is determined to not meet the low sulfur emission condition; The proportioning quantity resetting module is used for resetting proportioning quantity of each configuration gas when mixed gas is generated according to the contribution degree of each sulfur dioxide so as to obtain the mixed gas meeting the low sulfur discharge condition; The proportioning quantity resetting module comprises a target configuration gas acquisition unit, a threshold flow calculation unit and a threshold flow calculation unit, wherein the target configuration gas acquisition unit is used for acquiring target configuration gas with highest sulfur dioxide contribution degree, first associated configuration gas with medium sulfur dioxide contribution degree and second associated configuration gas with lowest sulfur dioxide contribution degree from all configuration gases, the threshold flow calculation unit is used for calculating the threshold flow of the target configuration gas through a preset formula, the threshold flow of the target configuration gas is the maximum value of V1 calculated through the preset formula, and the preset formula is as follows: wherein, the method comprises the steps of, The mixed gas mixing device comprises a first proportioning quantity adjusting unit, a new proportioning quantity judging unit, a low-sulfur mixed gas generating unit, a heat value obtaining unit and a second proportioning quantity adjusting unit, wherein Si is a preset threshold value of the sulfur content of mixed gas, si is an actual measurement value of the total sulfur content of the ith collocation gas, vi is an hour flow of the ith collocation gas, ni is an exhaust gas quantity generated by combusting the ith collocation gas per cubic gas, the first proportioning quantity adjusting unit is used for adjusting the proportioning quantity of the target collocation gas according to the threshold flow to obtain a new proportioning quantity, the new proportioning quantity judging unit is used for judging whether the mixed gas meets a preset mixing standard on the basis of the new proportioning quantity, the low-sulfur mixed gas generating unit is used for generating mixed gas meeting a low-sulfur emission condition according to the new proportioning quantity when the mixed gas meets the preset mixing standard, the heat value obtaining unit is used for respectively obtaining heat values of the first associated collocation gas and the second associated collocation gas when the mixed gas does not meet the preset mixing standard, and the second proportioning quantity adjusting unit is used for carrying out adjustment on the first associated collocation gas and the second associated collocation gas according to the preset flow until the preset proportioning quantity of the first associated collocation gas meets the preset mixing standard.
8. An electronic device, the electronic device comprising: At least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of automatically controlling sulfur content in a mixed gas as claimed in any one of claims 1 to 6.
9. A computer readable storage medium, characterized in that the computer readable storage medium stores computer instructions for causing a processor to execute the method for automatically controlling the sulfur content in a mixed gas according to any one of claims 1-6.

Description

Automatic control method, device, equipment and medium for sulfur content in mixed gas Technical Field The invention relates to the field of sulfur content control, in particular to an automatic control method, device, equipment and medium for sulfur content in mixed gas. Background The existing metallurgical enterprise mixed gas is mainly prepared by mixing three kinds of gas, namely blast furnace gas, coke oven gas and converter gas, wherein the sulfur content of the coke oven gas is maximum, the blast furnace gas is secondary, and the converter gas is minimum. With the realization of ultralow emission of flue gas of a steel rolling industry kiln and the popularization and application of a source gas desulfurization technology, a mixed gas furnace kiln of a steel rolling system of a metallurgical enterprise has started to implement source gas desulfurization so as to realize centralized control of sulfur content in sulfur-containing emissions in flue gas of a mixed gas heating furnace in the steel rolling system. In the prior art, the flue gas desulfurization of the mixed gas furnace kiln adopts source treatment, namely gas desulfurization, and the mixed gas desulfurization mainly refers to desulfurization of blast furnace gas and coke oven gas, and then the mixed gas is mixed with converter gas according to a certain flow ratio, so that mixed gas with low sulfur content is prepared. The prior art has the following problems that the total sulfur content in the mixed gas is required to be monitored because the sulfur content in the gas fluctuates, but the flue gas coefficient of the mixed gas is easy to change because the mixed gas is subjected to the proportioning change of the preparation gas, so that the sulfur content in sulfur-containing emissions in the flue gas is difficult to adjust based on the total sulfur content in the mixed gas, and the purpose of controlling the sulfur content in the flue gas generated by burning the mixed gas cannot be achieved through automatic control of the sulfur content in the mixed gas. Disclosure of Invention The invention provides an automatic control method, device, equipment and medium for sulfur content in mixed gas, which can solve the problem that the sulfur content in smoke generated by the combustion of the mixed gas cannot be controlled by automatically controlling the sulfur content in the mixed gas in the prior art. In a first aspect, an automatic control method for sulfur content in mixed gas is provided, the method comprising: mixing and preparing a plurality of configuration gases according to a preset proportioning amount to obtain mixed gas, wherein the proportioning amount is the hour flow rate of each configuration gas which is matched with a mixed gas furnace kiln; Collecting at least one configuration gas real-time parameter of each configuration gas, and estimating the sulfur content in the mixed gas according to the configuration gas real-time parameter, wherein the sulfur content in the mixed gas is the sulfur dioxide content in the flue gas generated after the mixed gas is combusted; If the sulfur content is determined to not meet the low sulfur emission condition, calculating the sulfur dioxide contribution degree of each configuration gas to the mixed gas according to at least one configuration gas real-time parameter of each configuration gas; And (3) re-determining the proportioning amount of each configuration gas when the mixed gas is generated according to the contribution degree of each sulfur dioxide so as to obtain the mixed gas meeting the low-sulfur discharge condition. In a second aspect, the present invention provides an automatic control device for sulfur content in a mixed gas, the device comprising: The mixed gas generation module is used for mixing and preparing a plurality of configuration gases according to a preset proportioning amount to obtain mixed gas, wherein the proportioning amount is the hour flow rate of each configuration gas which is mixed into the mixed gas furnace kiln; The mixed gas sulfur content calculation module is used for collecting at least one configuration gas real-time parameter of each configuration gas and estimating the sulfur content in the mixed gas according to the configuration gas real-time parameter, wherein the sulfur content in the mixed gas is the sulfur dioxide content in the flue gas generated after the mixed gas is combusted; The sulfur dioxide contribution degree calculation module is used for calculating the sulfur dioxide contribution degree of each configuration gas to the mixed gas according to at least one configuration gas real-time parameter of each configuration gas if the sulfur content is determined to not meet the low sulfur emission condition; and the proportioning quantity resetting module is used for redetermining proportioning quantity of each configuration gas when the mixed gas is generated according to the contribution degree of each sulfur dioxide so as to obtain th